Knife sharpener



Apnl 1927' w. H. M cALL KNIFE SHA RPENBR Filed se ta. 1922 2 Sheets-Sheet 1 jwuwwto'z William I 8488.

- April. 19. 1927.

w. H. MOCALL KNIFE SHARPENBR Filed Sept.2. 1922 sheets-sneeze gwuentoz William EM Call Patented Apr. 19, 1927.

UNITED STATES WILLIAM H. MCCALL, OF PHILADELPHIA, PENNSYLVANIA.

KNIFE SHARPENER.

Application filed September 2, 1922. Serial No. 585,874.

This invention relates to Sharpeners for edge tools. a

The object of the invention is to provide a sharpener of simple, economical and durable construction by which knife or scissorblades may be quickly and properly sharpened.

These objects, and other advantageous ends which will be described hereinafter, I attain in the following manner, reference being had to the accompanying drawings in which Figure 1 is a top plan view of the improved sharpener,

Figure 2 is a side elevation,

Figure 3 is a transverse sectional view taken on the line 33 of Figure 2,

Figure 4 is a side elevation of a bracket forming part of the device,

Figure 5 is an end view of the bracket,

Figure 6 is a plan View of a blank from which the bracket is made,

Figure 7 is an enlarged fragmentary detail plan view showing some of the sharpener disks in normal position, and

Figure 8 is a similar view with the disks in sharpening position.

The improved sharpener comprises a U- shaped bracket 9 including an attaching plate 10 extending beyond the body of the bracket and provided with openings 11 near its ends to receive fastenings by which it may be anchored to a bench or table. The bracket is preferably produced from a blank section of sheet metal and has opposite sides 12 converging from plate 10 and bent up at right angles along the dotted lines 13 to form the legs of the U. The opposed edges of each leg converge at an equal incline to provide aligned edges against which the blades of scissors or the like may be guided while their edges are being sharpened. Sides 12 are provided in their top edges, midway of their ends, with concave depressions or recesses 14: and, near each end, with openings 15 adapted. to receive pins 16. Sharpening disks 18 preferably of steel, file tempered, are loosely mounted on pins 16 and spacing disks 19 are mounted between the disks to hold them in spaced relation. The sharpening and spacing disks are ar ranged in two series, the sharpening disks on one pin being staggered with relation to the sharpening disks on the other pin, the sharpening disks of one series being normally in line with the spacers of the other series but spaced from the edges thereof. The sharpener disks overlap at their peripheral portions.

The spacers 19 are of uniform but smaller diameter than the sharpening disks 18.

Disks 18 and spacers 19 are loose on the pins 16 with slight play between, to permit them to cant, or move at an angle to present sharp edges or corners 21 to the edge 22 of a knife blade 23 as it is drawn between the disks or to a scissor blade as it is drawn against the edges of the legs 12 and the under side of the disks as shown in Figure 2. Pins 16 have their ends upset or otherwise anchored to the sides of the bracket to hold them against spreading.

In practice, the knife blade, or other edge tool, is placed with its edge between the disks or against the inclined edge and the disk, as the case may be, and reciprocated with some pressure thereon. When the blade is moved in one direction as indicated by the arrow in Figure 8, the disks and spacers will be canted in that direction from the normal position shown in Figure 7 to the position shown in Figure 8 and the edges of the sharpening disks are presented to the blade. The convex edges of the circular disks grind concavely on opposite sides of the blade. Reverse movement results in reverse canting of the disks and a sharpening action against their opposite edges. By the opposed arrangement, or double series of disks, the opposite sides of the blade are simultaneously acted upon and the edge quickly and properly sharpened. The disks also turn so that different portions of their edges are presented for sharpening action.

While I have described my invention as taking a particular form, it will be understood that the various parts of my invention may be changed without departing from the spirit thereof, and hence I do not limit myself to the precise construction set forth, but consider that I am at liberty to make such changes and alterations as fairly come within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a sharpener for edge tools having cutting disks and spacing disks rotatably mounted on shafts, a support having a flat bottom portion with apertures near its ends and upwardly extending side portions for supporting the shafts, the side portions being shorter than-the bottom portion and having their ends cut away ill; sud-l1 enhzingleus to provide planes for guiding bevel edged tools while being sharpened.

2. In a sharpener for edge teelshaving cutting disks and spacing disks loosely mounted on shaft-s; a support, struck from a single piece of materiel,Lhuvingeiint betteni with fastening apertures therein, sides shorter than the bOttOlllJlllthbGllll at right 1 angles thereto and having shaft retaining apertures therein, and inclined faces formed on theends of the sides foi guiding' bevel edged tool-s While'being sharpened.

IIPtOStlIDOHy whereof I have signed my 15 name to this specification.

\VILLIAM I-I. MCCALL. 

